1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt < %s -S -instcombine -instcombine-lower-dbg-declare=0 | FileCheck %s 3 4; In this example, instcombine wants to turn "local" into an i64, since that's 5; how it is stored. It should keep the debug info referring to the alloca when 6; it does the replacement. 7 8; C source: 9; struct Foo { 10; int x, y; 11; }; 12; void escape(const void*); 13; void f(struct Foo *p) { 14; struct Foo local; 15; *(__int64 *)&local = *(__int64 *)p; 16; escape(&local); 17; } 18 19; ModuleID = '<stdin>' 20source_filename = "t.c" 21target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128" 22target triple = "x86_64-pc-windows-msvc19.11.25508" 23 24%struct.Foo = type { i32, i32 } 25 26define void @f(%struct.Foo* %p) !dbg !11 { 27; CHECK-LABEL: @f( 28; CHECK-NEXT: entry: 29; CHECK-NEXT: [[LOCAL:%.*]] = alloca i64, align 8 30; CHECK-NEXT: call void @llvm.dbg.declare(metadata i64* [[LOCAL]], [[META22:metadata !.*]], metadata !DIExpression()), [[DBG23:!dbg !.*]] 31; CHECK-NEXT: [[TMP0:%.*]] = bitcast %struct.Foo* [[P:%.*]] to i64*, [[DBG24:!dbg !.*]] 32; CHECK-NEXT: [[TMP1:%.*]] = load i64, i64* [[TMP0]], align 8, [[DBG24]], [[TBAA25:!tbaa !.*]] 33; CHECK-NEXT: store i64 [[TMP1]], i64* [[LOCAL]], align 8, [[DBG29:!dbg !.*]], [[TBAA25]] 34; CHECK-NEXT: [[TMP2:%.*]] = bitcast i64* [[LOCAL]] to i8*, [[DBG30:!dbg !.*]] 35; CHECK-NEXT: call void @escape(i8* nonnull [[TMP2]]), [[DBG31:!dbg !.*]] 36; CHECK-NEXT: ret void, [[DBG32:!dbg !.*]] 37; 38entry: 39 %local = alloca %struct.Foo, align 4 40 %0 = bitcast %struct.Foo* %local to i8*, !dbg !24 41 call void @llvm.dbg.declare(metadata %struct.Foo* %local, metadata !22, metadata !DIExpression()), !dbg !25 42 %1 = bitcast %struct.Foo* %p to i64*, !dbg !26 43 %2 = load i64, i64* %1, align 8, !dbg !26, !tbaa !27 44 %3 = bitcast %struct.Foo* %local to i64*, !dbg !31 45 store i64 %2, i64* %3, align 4, !dbg !32, !tbaa !27 46 %4 = bitcast %struct.Foo* %local to i8*, !dbg !33 47 call void @escape(i8* %4), !dbg !34 48 %5 = bitcast %struct.Foo* %local to i8*, !dbg !35 49 ret void, !dbg !35 50} 51 52declare void @llvm.dbg.declare(metadata, metadata, metadata) 53 54declare void @escape(i8*) 55 56!llvm.dbg.cu = !{!0} 57!llvm.module.flags = !{!6, !7, !8, !9} 58!llvm.ident = !{!10} 59 60!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 6.0.0 ", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3) 61!1 = !DIFile(filename: "t.c", directory: "C:\5Csrc\5Cllvm-project\5Cbuild", checksumkind: CSK_MD5, checksum: "d7473625866433067a75fd7d03d2abf7") 62!2 = !{} 63!3 = !{!4} 64!4 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !5, size: 64) 65!5 = !DIBasicType(name: "long long int", size: 64, encoding: DW_ATE_signed) 66!6 = !{i32 2, !"CodeView", i32 1} 67!7 = !{i32 2, !"Debug Info Version", i32 3} 68!8 = !{i32 1, !"wchar_size", i32 2} 69!9 = !{i32 7, !"PIC Level", i32 2} 70!10 = !{!"clang version 6.0.0 "} 71!11 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 5, type: !12, isLocal: false, isDefinition: true, scopeLine: 5, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !20) 72!12 = !DISubroutineType(types: !13) 73!13 = !{null, !14} 74!14 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !15, size: 64) 75!15 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "Foo", file: !1, line: 1, size: 64, elements: !16) 76!16 = !{!17, !19} 77!17 = !DIDerivedType(tag: DW_TAG_member, name: "x", scope: !15, file: !1, line: 2, baseType: !18, size: 32) 78!18 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 79!19 = !DIDerivedType(tag: DW_TAG_member, name: "y", scope: !15, file: !1, line: 2, baseType: !18, size: 32, offset: 32) 80!20 = !{!21, !22} 81!21 = !DILocalVariable(name: "p", arg: 1, scope: !11, file: !1, line: 5, type: !14) 82!22 = !DILocalVariable(name: "local", scope: !11, file: !1, line: 6, type: !15) 83!23 = !DILocation(line: 5, column: 20, scope: !11) 84!24 = !DILocation(line: 6, column: 3, scope: !11) 85!25 = !DILocation(line: 6, column: 14, scope: !11) 86!26 = !DILocation(line: 7, column: 24, scope: !11) 87!27 = !{!28, !28, i64 0} 88!28 = !{!"long long", !29, i64 0} 89!29 = !{!"omnipotent char", !30, i64 0} 90!30 = !{!"Simple C/C++ TBAA"} 91!31 = !DILocation(line: 7, column: 3, scope: !11) 92!32 = !DILocation(line: 7, column: 22, scope: !11) 93!33 = !DILocation(line: 8, column: 10, scope: !11) 94!34 = !DILocation(line: 8, column: 3, scope: !11) 95!35 = !DILocation(line: 9, column: 1, scope: !11) 96